Loom shuttle



March L3, 1951 J. J. KAUFMANN, JR 2,545,427

LOOM SHUTTLE Filed Dec. 4, 1948 ]N VEN TOR.

ATTORNEY.

JOHN J KAUFMANN JR.

Patented Mar. 13,v 1951 LooM snur'rLE John J. Kaufmann, Jr., Greenville. S. C., assignor to Steel Heddle Manufacturinglompany, Philadelphia, Pa., a corporation of Pennsylvania Application December 4, 1948, Serial No. 63,478

. 4 claims'. l

This invention relates to loom shuttles, and it `relates more particularly to the tip portions of `the shuttles and the manner in which the same are secured in the body portions of the shuttles. As is well known, the shuttles used in looms for weaving have their body portions usually -made of wood with metallic tips at each end, and

in the use of such shuttles considerable difculty ari's'es'becase Aof the tips becomingloosened by reason of the varying shocks to which they are subjected asthe -shuttles are projected back and :forth acrosszthe 100mi v It has been found in practice that there is a tendency-of the tip memberl to turn `with respect to the shuttle in which it is mounted and thus become loose, and this would seem to indicate l that at times there is a certain torque applied to the shuttle tip in the picking action, but it is never certain in which direction the torque will ,end of the shuttle, particularly, if the twisting action is, in the direction which would cause the `threads on'the shank to add to the tendency to loosen the tip with respect to the shuttle'body.

It also happens that, by reason of the application of the forces applied in picking the shuttles, the ends of the shuttles often become split.

It has been suggested to provide sleeves in annular grooves in the ends of the shuttle body surrounding the shanks of the tips to minimize the splitting of the shuttles when the picking forces are applied, and here again, the difculty has occurred that such sleeves will often become loosened in the ends of the shuttles and in many instances will turn with the shuttle tip and thereby become loosened in the grooves in which they are seated.

The principal object of the present invention is to provide a shuttley tip construction which will effectively prevent the loosening of the tip members in the ends of the shuttle.

A further object of the invention is to provide a shuttle tip construction, of the character aforesaid, in which the rotationY of the tip member about the axis of the shuttle and the consequent loosening of said tip member will be prevented.

A further obiect of the invention is to provide a reinforcing sleeve of novel construction which not only will not rotate in the shuttle body. but

will also coact with the shank of the tip member to prevent said tip member from rotating and becoming loosened, as well as serving its primary purpose of preventing splitting of the end of the shuttle body. f

The nature and characteristic features of the present invention will be more readily understood from the following description, taken in connection with the accompanying drawing forming part hereof, vin which:

I Figure 1 is a top or plan view, partly in section,

lofa shuttle having a tip construction embodyig'the main features of. the present invention;

Fig. 2 isvan enlarged cross-sectional view taken on theline 2--2 of Fig. 1;

Fig. 3 is an enlarged perspective view of a detached sleeve member made in accordance with the present invention;

Fig. 4 is a side elevation, enlarged, of a tip member of the present invention detached from the shuttle.

It should, of course, be understood that the description and drawing herein are illustrative merely, and that various modications and changes may be made in the structure disclosed without departing from the spirit of the invention.

Referring to the drawing, in the particular embodiment of the invention therein shown, "5 is the shuttlebody, preferably made of wood, the front end of Ywhich is of tapered form and has a metallic tip member 6 mounted thereon. A

The main portion 1 of the tip member 6 is of the usual curved conoidal shape having a shank portion 8 extending from the base thereof. The end of the shuttle body 5 has a hole 9 bored therein for the reception of the shank 8 of the tip member 6. The diameter of the hole 9 is somewhat less than that of the shank 8 of the tip member so that when the tip member is mounted on the shuttle body, the shank 8 thereof will be firmly gripped and held in the hole.

The shank 8 may, if desired, be provided with the usual helical groove I0, but in accordance with the present invention, the shank 8 is, in any event, provided with an enlargedl part Il immediately to the rear of the rear or base surface of the tip member, which part Il is of non-circular shape, being preferably hexagonal in crosssection. A

YThe rear or base surface of the tip member 6 is preferably provided with an annular recess I2 so that the peripheral edge of said base surface of the tip member 6 will contact closely with the end of the shuttle body.

jcircular portion I I 'of the shank 8.

order to overcome any tendency of the sleeve It is, of course, well known that whenever a tip member having a shank portion is driven into a hole of a smaller diameter there is a definite tendency to split the end of the shuttle body, and to overcome this it has been usual to provide a metallic sleeve in the end of the shuttle body surrounding the shank of the tip member, the same being driven into a complemental Vannular groove, thereby to eiectively reinforce the end of the shuttle body and prevent the same from splitting.

However, it has been found that such sleeves have a tendency, when subjected to the repeated impacts which occur in the use of the shuttles, to become loose, and whenever the tip `member 'is caused to rotate in the end of the shuttle body the sleeve member will usually rotate in unison therewith, particularly after the shuttle has been in use for some time.

In the preferred form of the present invention there is provided a sleeve I3 mounted in an annular groove 'I6 in the end of the shuttle body in such location as to 'surround the enlarged non- However, in

member I3 to rotate in the end of the shuttle body, the :same is knurled or 'fluted exteriorly from -end to end as at I4 and as 'shown in Figs. 2 and 3 of the drawing.

The provision of the knurling or flutes I4 on the exterior surfaceof the sleeve I3 `also facilitates the positioning of the sleeve member in the end 'of the shuttle body as the outeredges of the flutes will be embedded in the wood and consequently the same degree of accuracy in 'the cutting of the annular groove in which the sleeve member is positioned will not be required.

It has been found that shuttles having tip constructions, as hereinbefore described, will have the tip members more rmly held in the Vends of the shuttle bodies, and through the use of this arrangement there will be less necessity to vdiscard otherwise good shuttles by reason of the tip members lbecoming loose.

I fclaim:

`1. In a lo'orn shuttle 'of the character described, a tip member having a shank positioned in a yhole in the end of the shuttle body, said shank having an enlarged portion of polygonal crosssection immediately to the rear ofthe base of the tip member, and the rest of the shank being substantially cylindrical.

2. In a loom shuttle of the character described, a tip member having a shank positioned in a hole in the end of the shuttle body, said shank having an enlarged portion of polygonal cross-section immediately to the rear of the base of the tip member, and a sleeve mounted in the shuttle body separated from but surrounding the enlarged Apolygonal portion of the shank'o'f the tip member.

3. In a loom shuttle of the character described. a tip member having a shank positioned in a hole in the end of the shuttle body, said shank having an enlarged portion of polygonal cross-section immediately to the rear of the base of the tip member, and va vsleeve mounted in the shuttle body separated rom but surrounding the enlarged polygonal portion of the shank of the tip member, said sleeve Vhaving a surface longitudinally luted.

4. In a loom shuttle of the character described, a tip member having aashank positioned in a hole in the end ofthe shuttle body, said shank having an enlarged portion of polygonal cross-section immediately to the rear of the base of the tip member, land a sleeve mounted in the shuttle body -:separated from but' surrounding the enlarged polygonal portion rof the shank of the tip member, said sleeve having itsexterior surface longitudinally ,uted.

JOHN J. Jn.

`.REFERENCES CITED The following references are of record in the le of this patent-2 UNITED STATES PATENTS Number Name Date 35,602 -Frink June 17, 1862 639,896 Hamblin r .v r Dec. 26, .1899 1,239,085 Coolidge 1 Sept. 4, 1917 1,489,584 Tinkham Apr. 8, .1924 2,421,599 Cash June, .1947 12,501,624 Tiit =..l l Mar. 21, 1950 p FOREIGN PATENTS `Number Country Date 3,893 Great Britain of 1912 12,352 Great Britain .--1 of 1897 389,459 lGermany Feb. 8., 1924 475,646 Germany ei- Apr. 27, "1929 

